Draft appliance for steam-engine boilers.



J.V S. DOWNING.

DRAFT 'APPLIANGE PoR STEAM Emma BOILERS. APPL'IGATION FILED AUG. 1a, 1908.v 947,660, Patented Jan.25, 1910.

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J. s. Domme. 4 `DRAFT APPLIANCE FOR STEAM ENGINE BOILERS. APPLICATION FILED AUG. 13, 1908.

Patented Jan. 25, 1910.

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"45 stand and 'exhaust UNiTEDjsTAirns orwell.N i

JAMES s. Downlive,V or ATLANTA, GEORGIA. 'AssIG'NonDY DIRECT AND rfrnsmrrvss1eNMnNTs,. To DowNrNe LoooMoTrvn DRAFT -APDLIANCE c oivnuuw, or AT- LANTA, GEORGIA, A conronATIoN or GEORGIA DAFT Arrnmivon4 ron STEAMLENGINE noILnns Specification of Letters Patent.,

- Appucatiomea August 1 3, 190s. serial No. 4413.373..

' 4 To dll-'whom it may concern: i

lanta, in -the countyof Fulton .and State of ful Im rovements in Draftjy Steamn'gine Boilers; and I clarel the. followingto'be' a'.full', clear`,1j and exact desscription` of fthe `invention, ji such as have invented certainevv andluse- A ppliances for o hereby.` de

Willenahle others skilled in theartto which it a pertain tom'ake'f-and usethe'sa'me.

T is invention'relates to a'draft appliance" forsteani engine boilers, and has for'an ob- 'jectto `provide a device employing theexj.

p roduce the maxinnnn .eiliciency haust to y draft Wit in thestack.

" A further object of the invention providenozzles for the exhaust .jporte poperlyf directed to exhaust t eA Within' ythe stack with the minimum.

proportioned and steam frlction and maximum vacuum eiliciencyf A further object of the invention is to provide an exhaust standvvth hozzles removably secured Within the stand.

A; further object of they invention is provide -in a draft ap" stand with.v exhaust no'zz Withinthe stand and with improved'gmeans in ositi'on.

tions,

parts, as willbe hereinafter y 85 and claimed..

` transverse sectional section of.

vation andl taken v for positioning and maintaining ,the nozzles f [thedischarge of steam from then per ends ith these and` other objects'in .'viefivvj,l the l) invention comprises certain no lvel construcf.

combinations and `arran ements.of`

I'Figs. 1 and 2. i

draft 4stand is provided Withjsockets havlnlg 'sockets thedraft-nozzles 13 are seated ref-A er'ably` provided at their upper ends `Wit annular shoulders .14 `which are flattened as Vat 1 5 v t `o .prop'erly 4position lto alug 16 ri or inte ral with the exhaust .'stand. The raft noz'z es are freely removf able from; the stand-andare maintained in position hybolts 17 having collars or washers v 18 en aging' upon the upper surfaces `ofthe shoul ersfflt lIhe nozzes 13 are borediinternallyv `upon 4ataper soi that the' adjacent substantially half Ithe vdistance at'the upper endwliile lthe sides 'of-the bore opposite, as

.tion cutting edges coinciding'substantially withthe ower 'edgesjof theftaperk 20. The peculiar `forma- "of the 'exhaust nozzles fand 'the re ativeexpansiongfof sucliffsteani. Thefex ansion of steam-per inch 'of rise .ca nbe de 4"ured out endg-above theynozzles af lift ipe of Fig. 3.

views.

nozzles carried thereby. Fig.. 4 is avertical,sectional.vieuT of the exf haust stand and'nozzles taken online "I entirely upon The exhaust stand 107 which .formera part i. of the present invention, is'adapted to se cured to the upper end of the exhaust 'pipes dis osed exactly above" the:` yexhaust `stan the; nozzlesfls'o that. the steam exhausted from the nozzlesex ands lin ,fits rise to the lower end' of theli t pipev exactly enough to fillv the flower. end fof suchdpipe! `The lift or petticoat-g23 vis A,connecte l incommunication with thestack .in 'any ap# proved -manne'n the connection'- dependin and he connection hereshownlisalso a con'- `ooimecting such Petticoat pipe andstack will be fully as applicable to the present inventiorhf Patented kJem. 25, 1910. l

sides-of the nozzles as at 19 are parallel for.

ionlythe adjacent sides as'21 and forming'vviththe main bore a crest 22 enttirely "about the' bore'jbut, at the op osito 0 l'iance an exhaust'l es removablyfseated' vortantelement of .the present invention. In

z 11 shown in the conventional front end of 55 iianges 12 atthe bottom Within which the nozzles relative iat '20,v are nclinedtoward eachother at the sov nitely fig- A attern is employed av.

an the .lower endof'thelft pipe at its'juncture with` the.. bell 51s accurately .positioned relative Ato y 4with 'the shell" in .-anyapprofvedmanner as bytherivets 25 and 4the. type of stack employe 'ventional showing and any other means of 10s the rear-of' the lift .pijiie-23` a ibaflie i plate 27 is secured to the boiler head aboveV the ends of the tiues shown diagrammatioally.

, yfront of the exhaust stand and baille plate a screen '32 is employed through which the smoke from the fiues 28 passes about the lift pipe first and then'byyreason of'the exhaust passing upwardly from the exhaust-nozzle within the lift pi e is`carried under the edge ofthe bell 24 andp upwardly within the pipe. Particular stress is laid upon the peculiar and' novel 'internal formationof the nozzles l13 with the angles and relative inclinations of t'h'e'bores` and the position of such nozzles relative to the lift pipe and thel proportions ofsuch nozzles'and pipe so that the-exhaust steam discha'r ed from' such nozzle'is discharged asin icated in Fig. v1- .with the expanslon also asindicated whereby the lower f end ofthe lift pipe'is accurately filled with exhauststeam toserve as' a fluidv piston in exhausting the front end to'draw the' smoke, sparks, etc'. .through the lues 28 and screen 32 within the v,chamber-above thescreen and baffle plate and Afinally up the lift;T pipe. I` rllhe'present invention is not intended -by any means as a sparkarrester,j "but :notwithstanding thatf act-v` the employment ofthe screenV L32 .discharging as 'itv'does the smoke.

and'sparks above the lower lendof the lift pipe serves todrop the sparks, ifany .such arrive at such chamber, below thelower end 'of the lift' pipe where they can` do no damage'. The essence of the present invention is the formation ofthe'discharge nozzles and the relation of such discharge nozzles both 'as to position and size to the lift pipe.

` `What I claim is '1, The combination with a stack, of a tapered lift vpipe dis osed as a continuation thereof and forme j with a petticoat at its lower' end, anda plurality of exhaust' nozzles jsideb'y'sideand so formed that theiraxes 1'cor'iveH e fillVA the lower 'g end ofi the lift I., fcornbination a stack, of aI wf upwardly and discharge into and pered lift pipe disposed as a continuation thereof and formed with a reversely tapered petticoat-at its lower end,.and a plurality of tapered. exhaust nozzles side by side so formed that their axes converge upwardlyl and discharge into and fill the lower end of the lift pipe.

The combination with a stack, of a tapered lift pipe dis -osed asa'continuation thereof and forme with a petticoat at its lower end, and a plurality of exhaust nozzles so positioned slde by side that Atheir axes converge upwardly and discharging into the lift pipe and so proportioned and positioned that the expanslon of the exhaust fills the lower .end of such lift pi e. l

4. The combinationl with a stack, of a lift pipe disposed as a continuation thereof, and smaller at the bottom, a petticoat formed about the bottom of the lift pipe and forming a bell, a plurality of internally tapered exhaust nozzles disposed below the petticoat and so'. positioned that their axes convergev upwardly' and the exhaust discharged from the sa'id nozzles expands to correspond .in area to the area of the lower end of thelllft pipe.

5. The combination with a front end hav- -ing flues communicating therewith, of a baiie plate disposed atan inclinationv within the front end', and covering the forward end of the flues, an exhaust stand erected in the front end and extending upwardly through- -the baiiie plate, a lift pipe formed as a stack,

continuation and extending downwardly vwithin the front end'and terminating above the exhaust stand, a petticoat formed about ther lower end of the lift pipe, exhaust nozzles removably secured to the top of the exhaust stand,-.and 'so lpositioned that their axes converge upwardly and so proportioned that the exhaust discharged from the said nozzles expands to correspond in area to and to ll the lower endof the lift pipe. In testimony whereof I aiix my signature in presence of two witnesses. A

JAMES AS. DOWNIN Lr. Witnesses: l

A. lT. CURRY, SOHNE. Coormz. 

